If only there were any "official sources" to draw such information from!
Thankfully, Paul does know what he's talking about, and yes, the Hendon Vulcan saga essentially took place ahead of 607's retirement, which is why 318 is in Hendon, and 607 is parked on the A15.
But of course, explaining why the situation is as it is, doesn't necessarily imply that it's a good situation to be in. It doesn't make 607's future any more secure.
As I said previously, it needs someone (or a group) to get 607 under cover, with Lottery help or whatever else it takes. But the aircraft still belongs to Waddington, and I suspect that unless someone with influence (or at least someone who can successfully bend the ear of the Station Commander) decides to do something about it, then it seems certain that 607 will just languish at the roadside until it is declared unsafe, and ultimately scrapped.